CVE-2025-8535VulnerabilityPublished 5 Aug 2025

CVE-2025-8535: cronoh NanoVault · Cross Site Scripting

Affects cronoh NanoVaultSource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

5.1Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 5 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
cronoh NanoVault	Affected =1.2.0 =1.2.1	Fixed in–

AI-suggested

Given the absence of official patches, European organizations should implement the following specific mitigations: 1) Restrict and monitor the use of NanoVault versions 1.2.0 and 1.2.1, and consider temporarily suspending their use until a patch is available. 2) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious payloads targeting the executeJavaScript function or the xrb URL Handler component. 3) Educate users about phishing risks and the dangers of clicking on untrusted links, emphasizing the potential for XSS exploitation. 4) Implement Content Security Policy (CSP) headers to limit the execution of unauthorized scripts within the NanoVault web interface. 5) Monitor network traffic and application logs for unusual activity indicative of exploitation attempts. 6) If feasible, conduct code reviews or sandbox testing of the NanoVault application to identify and block malicious inputs. 7) Engage with the vendor or community to encourage prompt patch development and share threat intelligence. 8) Consider alternative wallet solutions with active security support if mitigation is not feasible.

Description

A vulnerability, which was classified as problematic, has been found in cronoh NanoVault up to 1.2.1. This issue affects the function executeJavaScript of the file /main.js of the component xrb URL Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations using cronoh NanoVault, especially those involved in cryptocurrency management, financial services, or digital asset custody, this vulnerability poses a tangible risk. Exploitation could lead to unauthorized access to wallet contents, theft of digital assets, or compromise of user credentials. This can result in financial losses, reputational damage, and regulatory scrutiny under GDPR and other data protection laws. Since the vulnerability requires user interaction, phishing campaigns targeting European users could be a likely attack vector. Organizations relying on NanoVault for secure asset management may face operational disruptions and loss of trust from clients. The lack of vendor response and absence of patches increases the urgency for organizations to implement compensating controls. Additionally, the medium severity score suggests that while the vulnerability is not critical, it is sufficiently serious to warrant immediate attention, especially in sectors where asset security is paramount.

References

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